Separable-tooth saw



w. E. CULLEY. SEPARABLE TOOTH SAW. MPPLIQATION HLEDJUNE 2, 1920- BeissndFeb-15,1921, 15,038.

INVENTOR. v #0 ATTOR NEY.

UNITED STATES PATENT OFFICE.

WALTER E. CULLEY, 0F FITCHIBURG, MASSACHUSETTS, ASSIGNOR TO SIMONDSMANU- FACTURING COMPANY, OF FITCHBURG, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

filed June 2, 1920.

1 '0 all whom it may concern: Be it known that I, WALTER E. CULLEY, acitizen of the United States of America, residing at Fitchburg, in thecounty of lVorcester and Commonwealth of Massachusetts, have inventedcertain Improvements in separable-Tooth Saws, of which the following isa specification.

This invention relates to saws having separable or inserted teeth,-andconsists in the improved means for holding such teeth securely in placein the saw-plate and preventing any lateral movement between the teethand the locking-plate as hereinafter described and shown.

' I In the drawings forming a part of the specification, Figure 1, is aside elevation of a portion of a saw plate with a tooth and the improvedlocking-plate therefor, in place in the curved recess in the saw-plate;Fig. 2, is a perspective view of the improved lockingplate with theroughened and hardened portion on the inner surface at the top, to engage the tooth.

Referring to the various portions of the drawings by designatingcharacters, l,'is the saw-pl ate, 2, the tooth-locking or holding plate,3, the separable tooth, 4, the knurled or roughened portion of thelocking-plate at the tip and 5, the highly tempered or hardened portion,indicated by shading lines.

When the tooth and its locking-plate are inserted in place in thesaw-plate and forced tightly together, the hardened portion, or theknurls on the roughened portion of the lock ing-plate will be embeddedin the surface of the softer metal of the tooth and thus prevent anylateral movement of the tooth in relation to such plate and therebyobviate the customary objection of having the teeth Work loose andfrequently fly out of the sawplate. As shown, the hardened and theroughened portions of the locking-plate are SEPARABLE-TOOTH SAW.

Specification of Reissned Letters Patent. Rei s ued Feb, 15, 1921,

1 Original No. 1,308,541, dated July 1, 1919, Serial No. 294,410, filedMay 3, 1919. Application for reissue Serial No. 386,092.

on the inner edge at the top, but it is obvious that the hardened andthe roughened portions may be along any part of the edge which comes toa bearing on the edge of the separable tooth.

The highly tempered and roughened parts grip the softer metal of thetooth against which it is pressed.

I claim:

1. In a separable-tooth saw, a lockingplate having a portion thereofwhich bears upon the separable tooth, knurled or roughened, and suchportion hardened to a high degree, whereby when such plate and tooth arefirmly pressed together, the hardened portion will be embedded in thesurface of the softer metal of the tooth and thereby prevent relativelateral movement of 'the parts.

2. In a separable-tooth saw, aclamping bit or plate having its tip orupper end hardened to a high degree and the inner surface thereofroughened, whereby parts of the roughened surface will engage the softermetal of the tooth when the two are-firmly pressed together and therebyprevent lateral movement of the one in relation to the other.

3. In a separable-tooth saw, a clampingplate having a portion thereofwhich bears upon the separable-tooth, hardened to a high degree, wherebywhen such plate is firmly pressed against the tooth its hardened metalwill grip the softer metal of the tooth and prevent lateral relativemovement of the parts in contact.

' WALTER E. CULLEY.

